import { CallHandler, ExecutionContext, Injectable, NestInterceptor } from "@nestjs/common";
import { Observable } from "rxjs";
import { map } from 'rxjs/operators'; 

export interface Response<T> {
    data: T;
}

@Injectable()
export class TransformInterceptor<T> implements NestInterceptor<T, Response<T>> {
    intercept(context: ExecutionContext, next: CallHandler<T>): Observable<Response<T>> | Promise<Observable<Response<T>>> {
     return next.handle().pipe(map(data => ({ data })));   
    }
}